NaCl induced corrosion of Ti-6Al-4V alloy at high temperature

Clément Ciszak (1) , Ioana Popa (1) , Jean-Michel Brossard (2) , Daniel Monceau (3) , Sébastien Chevalier (1)

1 ICB - Laboratoire Interdisciplinaire Carnot de Bourgogne
2 VeRI - Veolia Recherche & Innovation
3 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

This paper presents a study on the Ti-6Al-4V behaviour in presence of NaCl deposit under dry and moistair environments at 560◦C. The results evidence a detrimental effect of the NaCl deposit with a synergisticeffect in presence of moist air environment. Treatments under dry and moist air with NaCl deposit for600 h, lead respectively to weight gains per unit area 5 and 15 times higher than observed under classicoxidation in dry air. Enhancement of the corrosion phenomenon is attributed to the presence of gaseousmetal chlorides, leading to the establishment of an active corrosion process.

Mots clés: Titanium; Alloy; SEMB. X-ray diffraction; High temperature corrosion

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Matériaux

Clément Ciszak, Ioana Popa, Jean-Michel Brossard, Daniel Monceau, Sébastien Chevalier. NaCl induced corrosion of Ti-6Al-4V alloy at high temperature. Corrosion Science, 2016, vol. 110, pp. 91-104. ⟨10.1016/j.corsci.2016.04.016⟩. ⟨hal-01411137⟩